Dual seal EGR tube assembly
US6874487B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2003 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Aug 20, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas re-circulation (EGR) tube includes a dual seal assembly that prevents exhaust gas leakages. The EGR tube has a first end in communication with an exhaust gas source and has a second end extending into an intake manifold enclosed within an intake manifold housing. A tapered sleeve surrounds the EGR tube at the second end. The sleeve has a first end that is directly attached to the EGR tube and a second end that is spaced apart from the EGR tube to define a gap. The sleeve has a tapered body such that the cross-sectional area of the gap increases from the first end to the second end of the sleeve. A first seal is positioned between the sleeve and the intake manifold housing and a second seal is positioned between the sleeve and the intake manifold. Grooves are formed within the exterior surface of the tube to receive the seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.